Where are the 5 buffalo on the flip side of Whistlestop Rails?

Solution 1:

Here are the locations of the Buffalos, copied the content over for posterity.

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Buffalo 1: In the background just after the first care flower.

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Buffalo 2: In the foreground to the left of the previous buffalo.

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Buffalo 3: In the background at the very beginning of the first train ride.

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Buffalo 4: In the background in a turn of the first train ride.

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Buffalo 5: On the rocks in the background just after the position of the second Poochy Pups.

Source